Plenty of people have heard about Google’s Project Fi, but not many have been lucky enough to test it. That’s because the service requires an invite, and a lot of waiting, to get in. But for the next 24 hours, Google is willing to provide everyone who is interested in the project with an instant invite.

For those unaware, Project Fi is Google’s attempt to enter the wireless market in the United States. The low-cost service operates over Wi-Fi networks, but when nearby Wi-Fi coverage is poor, the service taps into Sprint or T-Mobile’s cellular network, depending on which carrier is offering better coverage. The idea is to keep your phone seamlessly connected to the best network available around you.

The project was introduced in April earlier this year. Before the launch of the Nexus 6P and the Nexus 5X, the Nexus 6 was the only smartphone to be supported on the service. Prices start at $20 per month for voice and texts, with additional charges of $10 for each gigabyte of cellular data you use. Unlike many data plans out there, Google only charges you for the data you’ve actually consumed.

Head over to Project Fi’s page and check if your area is eligible for the service. As long as your area is within the service’s coverage, you should be able to sign up.